ipsec_handoff.c

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/*
 * esp_encrypt.c : IPSec ESP encrypt node
 *
 * Copyright (c) 2015 Cisco and/or its affiliates.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
 
#include <vnet/ipsec/ipsec.h>
#include <vnet/ipsec/ipsec_sa.h>
 
#define foreach_ipsec_handoff_error  \
_(CONGESTION_DROP, "congestion drop")
 
typedef enum
{
#define _(sym,str) IPSEC_HANDOFF_ERROR_##sym,
  foreach_ipsec_handoff_error
#undef _
    NAT44_HANDOFF_N_ERROR,
} ipsec_handoff_error_t;
 
static char *ipsec_handoff_error_strings[] = {
#define _(sym,string) string,
  foreach_ipsec_handoff_error
#undef _
};
 
typedef struct ipsec_handoff_trace_t_
{
  u32 next_worker_index;
} ipsec_handoff_trace_t;
 
static u8 *
format_ipsec_handoff_trace (u8 * s, va_list * args)
{
  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
  ipsec_handoff_trace_t *t = va_arg (*args, ipsec_handoff_trace_t *);
 
  s = format (s, "next-worker %d", t->next_worker_index);
 
  return s;
}
 
/* do worker handoff based on thread_index in NAT HA protcol header */
static_always_inline uword
ipsec_handoff (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame,
               u32 fq_index)
{
  vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
  u16 thread_indices[VLIB_FRAME_SIZE], *ti;
  u32 n_enq, n_left_from, *from;
 
  from = vlib_frame_vector_args (frame);
  n_left_from = frame->n_vectors;
  vlib_get_buffers (vm, from, bufs, n_left_from);
 
  b = bufs;
  ti = thread_indices;
 
  while (n_left_from >= 4)
    {
      /* Prefetch next iteration. */
      if (n_left_from >= 12)
        {
          vlib_prefetch_buffer_header (b[8], LOAD);
          vlib_prefetch_buffer_header (b[9], LOAD);
          vlib_prefetch_buffer_header (b[10], LOAD);
          vlib_prefetch_buffer_header (b[11], LOAD);
        }
 
      ti[0] = vnet_buffer (b[0])->ipsec.thread_index;
      ti[1] = vnet_buffer (b[1])->ipsec.thread_index;
      ti[2] = vnet_buffer (b[2])->ipsec.thread_index;
      ti[3] = vnet_buffer (b[3])->ipsec.thread_index;
 
      if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE))
        {
          if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED))
            {
              ipsec_handoff_trace_t *t =
                vlib_add_trace (vm, node, b[0], sizeof (*t));
              t->next_worker_index = ti[0];
            }
          if (PREDICT_FALSE (b[1]->flags & VLIB_BUFFER_IS_TRACED))
            {
              ipsec_handoff_trace_t *t =
                vlib_add_trace (vm, node, b[1], sizeof (*t));
              t->next_worker_index = ti[1];
            }
          if (PREDICT_FALSE (b[2]->flags & VLIB_BUFFER_IS_TRACED))
            {
              ipsec_handoff_trace_t *t =
                vlib_add_trace (vm, node, b[2], sizeof (*t));
              t->next_worker_index = ti[2];
            }
          if (PREDICT_FALSE (b[3]->flags & VLIB_BUFFER_IS_TRACED))
            {
              ipsec_handoff_trace_t *t =
                vlib_add_trace (vm, node, b[3], sizeof (*t));
              t->next_worker_index = ti[3];
            }
        }
 
      n_left_from -= 4;
      ti += 4;
      b += 4;
    }
  while (n_left_from > 0)
    {
      ti[0] = vnet_buffer (b[0])->ipsec.thread_index;
 
      if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED))
        {
          ipsec_handoff_trace_t *t =
            vlib_add_trace (vm, node, b[0], sizeof (*t));
          t->next_worker_index = ti[0];
        }
 
      n_left_from -= 1;
      ti += 1;
      b += 1;
    }
 
  n_enq = vlib_buffer_enqueue_to_thread (vm, node, fq_index, from,
                                         thread_indices, frame->n_vectors, 1);
 
  if (n_enq < frame->n_vectors)
    vlib_node_increment_counter (vm, node->node_index,
                                 IPSEC_HANDOFF_ERROR_CONGESTION_DROP,
                                 frame->n_vectors - n_enq);
 
  return n_enq;
}
 
VLIB_NODE_FN (esp4_encrypt_handoff) (vlib_main_t * vm,
                                     vlib_node_runtime_t * node,
                                     vlib_frame_t * from_frame)
{
  ipsec_main_t *im = &ipsec_main;
 
  return ipsec_handoff (vm, node, from_frame, im->esp4_enc_fq_index);
}
 
VLIB_NODE_FN (esp6_encrypt_handoff) (vlib_main_t * vm,
                                     vlib_node_runtime_t * node,
                                     vlib_frame_t * from_frame)
{
  ipsec_main_t *im = &ipsec_main;
 
  return ipsec_handoff (vm, node, from_frame, im->esp6_enc_fq_index);
}
 
VLIB_NODE_FN (esp4_encrypt_tun_handoff) (vlib_main_t * vm,
                                         vlib_node_runtime_t * node,
                                         vlib_frame_t * from_frame)
{
  ipsec_main_t *im = &ipsec_main;
 
  return ipsec_handoff (vm, node, from_frame, im->esp4_enc_tun_fq_index);
}
 
VLIB_NODE_FN (esp6_encrypt_tun_handoff) (vlib_main_t * vm,
                                         vlib_node_runtime_t * node,
                                         vlib_frame_t * from_frame)
{
  ipsec_main_t *im = &ipsec_main;
 
  return ipsec_handoff (vm, node, from_frame, im->esp6_enc_tun_fq_index);
}
 
VLIB_NODE_FN (esp_mpls_encrypt_tun_handoff)
(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame)
{
  ipsec_main_t *im = &ipsec_main;
 
  return ipsec_handoff (vm, node, from_frame, im->esp_mpls_enc_tun_fq_index);
}
 
VLIB_NODE_FN (esp4_decrypt_handoff) (vlib_main_t * vm,
                                     vlib_node_runtime_t * node,
                                     vlib_frame_t * from_frame)
{
  ipsec_main_t *im = &ipsec_main;
 
  return ipsec_handoff (vm, node, from_frame, im->esp4_dec_fq_index);
}
 
VLIB_NODE_FN (esp6_decrypt_handoff) (vlib_main_t * vm,
                                     vlib_node_runtime_t * node,
                                     vlib_frame_t * from_frame)
{
  ipsec_main_t *im = &ipsec_main;
 
  return ipsec_handoff (vm, node, from_frame, im->esp6_dec_fq_index);
}
 
VLIB_NODE_FN (esp4_decrypt_tun_handoff) (vlib_main_t * vm,
                                         vlib_node_runtime_t * node,
                                         vlib_frame_t * from_frame)
{
  ipsec_main_t *im = &ipsec_main;
 
  return ipsec_handoff (vm, node, from_frame, im->esp4_dec_tun_fq_index);
}
 
VLIB_NODE_FN (esp6_decrypt_tun_handoff) (vlib_main_t * vm,
                                         vlib_node_runtime_t * node,
                                         vlib_frame_t * from_frame)
{
  ipsec_main_t *im = &ipsec_main;
 
  return ipsec_handoff (vm, node, from_frame, im->esp6_dec_tun_fq_index);
}
 
VLIB_NODE_FN (ah4_encrypt_handoff) (vlib_main_t * vm,
                                    vlib_node_runtime_t * node,
                                    vlib_frame_t * from_frame)
{
  ipsec_main_t *im = &ipsec_main;
 
  return ipsec_handoff (vm, node, from_frame, im->ah4_enc_fq_index);
}
 
VLIB_NODE_FN (ah6_encrypt_handoff) (vlib_main_t * vm,
                                    vlib_node_runtime_t * node,
                                    vlib_frame_t * from_frame)
{
  ipsec_main_t *im = &ipsec_main;
 
  return ipsec_handoff (vm, node, from_frame, im->ah6_enc_fq_index);
}
 
VLIB_NODE_FN (ah4_decrypt_handoff) (vlib_main_t * vm,
                                    vlib_node_runtime_t * node,
                                    vlib_frame_t * from_frame)
{
  ipsec_main_t *im = &ipsec_main;
 
  return ipsec_handoff (vm, node, from_frame, im->ah4_dec_fq_index);
}
 
VLIB_NODE_FN (ah6_decrypt_handoff) (vlib_main_t * vm,
                                    vlib_node_runtime_t * node,
                                    vlib_frame_t * from_frame)
{
  ipsec_main_t *im = &ipsec_main;
 
  return ipsec_handoff (vm, node, from_frame, im->ah6_dec_fq_index);
}
 
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (esp4_encrypt_handoff) = {
  .name = "esp4-encrypt-handoff",
  .vector_size = sizeof (u32),
  .format_trace = format_ipsec_handoff_trace,
  .type = VLIB_NODE_TYPE_INTERNAL,
  .n_errors = ARRAY_LEN(ipsec_handoff_error_strings),
  .error_strings = ipsec_handoff_error_strings,
  .n_next_nodes = 1,
  .next_nodes = {
    [0] = "error-drop",
  },
};
VLIB_REGISTER_NODE (esp6_encrypt_handoff) = {
  .name = "esp6-encrypt-handoff",
  .vector_size = sizeof (u32),
  .format_trace = format_ipsec_handoff_trace,
  .type = VLIB_NODE_TYPE_INTERNAL,
  .n_errors = ARRAY_LEN(ipsec_handoff_error_strings),
  .error_strings = ipsec_handoff_error_strings,
  .n_next_nodes = 1,
  .next_nodes = {
    [0] = "error-drop",
  },
};
VLIB_REGISTER_NODE (esp4_encrypt_tun_handoff) = {
  .name = "esp4-encrypt-tun-handoff",
  .vector_size = sizeof (u32),
  .format_trace = format_ipsec_handoff_trace,
  .type = VLIB_NODE_TYPE_INTERNAL,
  .n_errors = ARRAY_LEN(ipsec_handoff_error_strings),
  .error_strings = ipsec_handoff_error_strings,
  .n_next_nodes = 1,
  .next_nodes = {
    [0] = "error-drop",
  },
};
VLIB_REGISTER_NODE (esp6_encrypt_tun_handoff) = {
  .name = "esp6-encrypt-tun-handoff",
  .vector_size = sizeof (u32),
  .format_trace = format_ipsec_handoff_trace,
  .type = VLIB_NODE_TYPE_INTERNAL,
  .n_errors = ARRAY_LEN(ipsec_handoff_error_strings),
  .error_strings = ipsec_handoff_error_strings,
  .n_next_nodes = 1,
  .next_nodes = {
    [0] = "error-drop",
  },
};
VLIB_REGISTER_NODE (esp_mpls_encrypt_tun_handoff) = {
  .name = "esp-mpls-encrypt-tun-handoff",
  .vector_size = sizeof (u32),
  .format_trace = format_ipsec_handoff_trace,
  .type = VLIB_NODE_TYPE_INTERNAL,
  .n_errors = ARRAY_LEN(ipsec_handoff_error_strings),
  .error_strings = ipsec_handoff_error_strings,
  .n_next_nodes = 1,
  .next_nodes = {
    [0] = "error-drop",
  },
};
VLIB_REGISTER_NODE (esp4_decrypt_handoff) = {
  .name = "esp4-decrypt-handoff",
  .vector_size = sizeof (u32),
  .format_trace = format_ipsec_handoff_trace,
  .type = VLIB_NODE_TYPE_INTERNAL,
  .n_errors = ARRAY_LEN(ipsec_handoff_error_strings),
  .error_strings = ipsec_handoff_error_strings,
  .n_next_nodes = 1,
  .next_nodes = {
    [0] = "error-drop",
  },
};
VLIB_REGISTER_NODE (esp6_decrypt_handoff) = {
  .name = "esp6-decrypt-handoff",
  .vector_size = sizeof (u32),
  .format_trace = format_ipsec_handoff_trace,
  .type = VLIB_NODE_TYPE_INTERNAL,
  .n_errors = ARRAY_LEN(ipsec_handoff_error_strings),
  .error_strings = ipsec_handoff_error_strings,
  .n_next_nodes = 1,
  .next_nodes = {
    [0] = "error-drop",
  },
};
VLIB_REGISTER_NODE (esp4_decrypt_tun_handoff) = {
  .name = "esp4-decrypt-tun-handoff",
  .vector_size = sizeof (u32),
  .format_trace = format_ipsec_handoff_trace,
  .type = VLIB_NODE_TYPE_INTERNAL,
  .n_errors = ARRAY_LEN(ipsec_handoff_error_strings),
  .error_strings = ipsec_handoff_error_strings,
  .n_next_nodes = 1,
  .next_nodes = {
    [0] = "error-drop",
  },
};
VLIB_REGISTER_NODE (esp6_decrypt_tun_handoff) = {
  .name = "esp6-decrypt-tun-handoff",
  .vector_size = sizeof (u32),
  .format_trace = format_ipsec_handoff_trace,
  .type = VLIB_NODE_TYPE_INTERNAL,
  .n_errors = ARRAY_LEN(ipsec_handoff_error_strings),
  .error_strings = ipsec_handoff_error_strings,
  .n_next_nodes = 1,
  .next_nodes = {
    [0] = "error-drop",
  },
};
VLIB_REGISTER_NODE (ah4_encrypt_handoff) = {
  .name = "ah4-encrypt-handoff",
  .vector_size = sizeof (u32),
  .format_trace = format_ipsec_handoff_trace,
  .type = VLIB_NODE_TYPE_INTERNAL,
  .n_errors = ARRAY_LEN(ipsec_handoff_error_strings),
  .error_strings = ipsec_handoff_error_strings,
  .n_next_nodes = 1,
  .next_nodes = {
    [0] = "error-drop",
  },
};
VLIB_REGISTER_NODE (ah6_encrypt_handoff) = {
  .name = "ah6-encrypt-handoff",
  .vector_size = sizeof (u32),
  .format_trace = format_ipsec_handoff_trace,
  .type = VLIB_NODE_TYPE_INTERNAL,
  .n_errors = ARRAY_LEN(ipsec_handoff_error_strings),
  .error_strings = ipsec_handoff_error_strings,
  .n_next_nodes = 1,
  .next_nodes = {
    [0] = "error-drop",
  },
};
VLIB_REGISTER_NODE (ah4_decrypt_handoff) = {
  .name = "ah4-decrypt-handoff",
  .vector_size = sizeof (u32),
  .format_trace = format_ipsec_handoff_trace,
  .type = VLIB_NODE_TYPE_INTERNAL,
  .n_errors = ARRAY_LEN(ipsec_handoff_error_strings),
  .error_strings = ipsec_handoff_error_strings,
  .n_next_nodes = 1,
  .next_nodes = {
    [0] = "error-drop",
  },
};
VLIB_REGISTER_NODE (ah6_decrypt_handoff) = {
  .name = "ah6-decrypt-handoff",
  .vector_size = sizeof (u32),
  .format_trace = format_ipsec_handoff_trace,
  .type = VLIB_NODE_TYPE_INTERNAL,
  .n_errors = ARRAY_LEN(ipsec_handoff_error_strings),
  .error_strings = ipsec_handoff_error_strings,
  .n_next_nodes = 1,
  .next_nodes = {
    [0] = "error-drop",
  },
};
/* *INDENT-ON* */
 
/*
 * fd.io coding-style-patch-verification: ON
 *
 * Local Variables:
 * eval: (c-set-style "gnu")
 * End:
 */